高油气比下燃气分析测温探针反应冻结性能研究

Effective chemical quenching is needed to ensure the test accuracy of the combustor exit temperature distribution by temperature by gas analysis(TBGA). However, as the exit temperature of the combustor rises, the difficulty in chemical quenching increases. In this research, numerical simulation and chemical reaction calculation were conducted to explore the trends of quench ratio by changing the equivalence ratio and pressure ratio, respectively. The main factors in the quenching process were then analyzed. As the equivalence ratio increases, the CO change ratio increases first and then decreases, with the greatest value of 5.2% at the equivalence ratio of 0.9-1.0. As the pressure ratio decreases, a shockwave pushes back, and the static temperature rises, resulting in a drastic increase in CO and CO₂ concentrations.